Process of oupucatsmcj phonoqrafols



(No Model.)

G. H. HERRING'TON,

PROCESS 01: DUPLIGATING PHONOGRAMS. No. 399,265. Patented Mar. 12, 1889 Witnesses. linerenia'r.

g n l QWECEFIGATNN forming part of Bottom Poioni mlroron, or

on. salmon, clotecl lit-W011 12, woo.

finalisation filed fisp'lomlm' 21, 1888. Earlol lie. 285,978, l'r'o moclei.)

filo res of America, iolnla, io mom of Smlgwiol: anon, have im'onivorloorcnin new moms in the. Process of making i i noqroms, of r whli mo lollowing location, roforn being; loul to nooompnnying drawings and the let oi's. and. i pros of ref or lCE thoroon, iormioggo part of this speoiiination.

This inioniz'on in certain imprommonts in the prowess oi" winking duplicate copies of lionogrmns: noel ii: ronsi: o, limit. in. grooming plionogm-plu coming of Wax or con-12x is adopted to loo oofionoo o lion-l in registering the sound-Wows rom a phonograph upon so id propaoi oyiinilor Wltllv: its wax or oomposi t-ion is in a, ooi'istate, than in pormiaiing said woo: or composition "to cool oral ha den and thus prosorre ito zlwoloporl olinrooioro; omi, in propming shoots of oairi wax or componition, in. mfioning said shoots by means of heat, Fliiil opplymg'a-nd pressing them about; the oylimlor liming ibllf: original plionogram, or rollingoylinder across said snoetwith jorossnro to improso the plionogrammogiotrw tiono upon the am-fa-oo of mid oliootn, when the shooco are pormiitorl to harden or sot, and if about sail oylindor removed, marl Hum said olioeio are improsood with n nogniivo lnpliomfis copy of for original plaonogram; 21ml, thirtl, in proepzzring duplionio cylinders with o cooling of said won or oomposition, and while they are in a soft state fin the influence of heat ilxo oheel havim the negative 0011501; said shoei placed o o'ot Soicl cylinders, alul in oi slior motor; co prosso re is applied on ifioienil y to improoo a positive duplicate copy in'tl' o surface of mid duplioaie cylinders from. tho said negative copy. Then each is pormitt odio set or horclon to preserve the duplicates 3!: us obmined.

Figure 1'. represents the process of copying the registrations of the sound-vibrations of an original phonogram upon the surface of a eg'linderof similar dimensions by means of compression, Fig. 2 represents is. similar proooos of copying oaio. registrations upon a they are either rol od aoross,

plane sorfooo, snarl Fig. 3 represents the pro shoot of the copying material by means of placing sold mot-aria! about the cylinder hawing the original rooorrl thereon and by holding; mate. rial oompressod theronbout until the characters mo (iovoloped.

Referring to the illustrations, 0 ropreoonis a phonograph cylinder having registered ilieroon the original plionngrmn.

D represents a cylinder of similar 4limensions having a coat or covering of either Wax, rosin, piioll, celluloid, gluo, rubber, or their oompoumi, or some equivalentmaterial mlapiod to ho softened by znen-ns of heat or otherwise, on itv will revolve and retain the impression in reverse (lupli :ato of the record mode on tho original plzonogrnm by means of rolling the surfaces of the snirl two eylinclors iogotlior with onfliciont pressure to properly cause the record to be copied. (See Fig. 1.)

l2 representsoprepareelslioetorplanosurface of either Wax, rosin, pitch, celluloid, rubber, or their oomponnd,or some equivalent material, as before stated, which is adapted to be softened by means of heator otherwise and used in some instances in place of the cylinder 1) f for receiving and retaining in reverse duplicate the rrcord made on the original phonogram liy moons of rolling the cylinder having tlzo original record over the surface of said sheet or plane with. sufiicie'nfi pressure to properly cause the record to be copied, as in the former manner, (see F'g. 2,) and thus by the proeess described a fine rovomo duplicate or negative of the original plmnogram is procluoed, and when the said copying material upon whichthe copy is made becomes cool it will s ot and becomev firm and retain a rigid copy. In instances where certain kinds of said copying material are used which will form into flexible ohoers it is placed about the cylinder having thereon the original phonogmm whilo softaml retained thereon by suitable pressure until the copy has been impressed and tho material has become soiand the several characters well developed. (See Fig. 3.)

To produce positive duplicates of the original phonogrom, duplicate copying cylinders or sheets are prepared in like manner as oljovo doooribecl and subjocted to the some process and pressure in contact with the cyl-- inder or sheethaving the reverse or negative copy of the original phonogram thereon, and when the positive duplicate copies of the 5 original phonogram have set and their registrations have become firm they may be used in reproducing the sound-vibrations in a phonograph.

, Any desired number of. positive duplicate z'o copies of the original phonogram may bemade from the reverse or negative copy thereof in the manner and by the process stated. Duplicate positive copies of the original phonogram may be made from the reverse or negative duplicates thereof onsoft wax.

The essential features of my invention consist in ising one or more of the materials as follows: wax, resin, pitch, celluloid, glue, rubber, or their compound or equivalent, applied to a cylinder or roll or formed in planeshcet or strips, wherein they are adapted to be softened by means of heat or otherwise, so as to receive and retain, first, the reverse duplicate copy of the original phonogram, and, sec- 2 5 end, by using the said reverse duplicate copy for. producing positive duplicate copies of the original phonogram.

The use to which this process of duplicating the registrations of the sound waves or 0 vibrations is applied is in phonographs or any machine calculated to register sound waves or vibrations, as in telegraphic, electric, and other minute operations of similar character. I 1 am aware'of the'use of plastic material and materials adapted to be softened in various ways and impressed with characters and permitted to set or harden while in contact with the object of which the impression is 40 taken; but I am not aware that the hereindescribed process has heretofore been used, wherein a phonograph-cylinder is first covered with a coating of wax or composition which is adapted to be softened by heat and the phonogram-record made thereon while said coating is softened from the influence of heat, then permitted to harden, then. in. preparing sheets or strips of said wax or composition material and applying said sheets in contact with the original recorded cylinder when in a soft state from the influence of heat, thus impressing said sheet with anegative copy of the original record, then permittingsaid sheet to set to preserve the form of its copy, and removing it apart from the original record and applying duplicate cylinders, which are prepared with a coating of said wax or composition, in contact with said negative copy of said sheet while said duplicate 6o cylindersare softened from the influence of heat, so they will receive in their surface an impressed positive duplicate copy of the original phonogram, and then permitted to harden to preserve such copy, thus produc- 7 ing any number of positive duplicate copies of the original phonogram-record in such form as that it may be used in reproducing thesouhd-fibrations in a phonograph.

Having thus described my invention, what I claim as new, and desire to soon re by Letters Patent, is as follows, to wit:

1. The herein-described process of making duplicate copies of original phonograms, con sisting in preparing a phonograpii-cylinder with a coating of wax or composition which will soften under the influence of heat, thus forming a surface upon which to register the phonogram when said surf aceis in asoft state, then permitting said recorded surface to harden, in applying ashcet or stripprepared from said wax or composition, while in a soft state, from the influence of heat, in contact with said hardened recorded surface of the original phonogram, impressing said sheet or strip with said record, and while in such contact permitting the wax or composition to set, in removing said impressed sheet or strip from contact with the record, thus producing a negative duplicate copy; and in applying duplicate cylinders having a coating of said go wax or composition in contact with said negative copy while the coatings of said cylinders are softened from the influence of heat, impressing in their surface a positive duplicate copy of the original phonogram from said negative, substantially as and for the purpose specified;

2. The herein-described process of making duplicate copies of original phonograms, consisting in pressing sheets of wax or compost zoo tion which is adapted to soften from the influenceof heat in contact with the original phonogram while in a soft state, then permitt-ing it to se thus impressing said sheet with the original record, in removing said sheet or strip from contact with theoriginal record, thus forming a negative duplicate copy, and in applying. duplicate cylinders having a coating of said wax or composition in contact with said negative copy while the no coatings of said cylinders are softened from the influence of heat, thus impressing in their surface a positive duplicate copy of the original phonogram from the negative record,v substantially as and for the purpose specified. r 1 5 GEORGE H. IHERRINGTCN.

W i tnesses:

F. E. A. Snrrn, J. G. BABB. 

